Effect of feeding strategy and COD/sulfate ratio on the removal of sulfate in an AnSBBR with recirculation of the liquid phase

Journal of Environmental Management
Natália C ArchilhaEugenio Foresti

Abstract

The objective of this work was to analyze the effect of the interaction between feeding strategy and COD/sulfate ratio on the removal efficiency of sulfate and organic matter from a synthetic wastewater. An anaerobic sequencing batch reactor with recirculation of the liquid phase and containing immobilized biomass on polyurethane foam (AnSBBR) was used. The AnSBBR with a total volume of 3.7 L, treated 2.0 L synthetic wastewater in 8-h cycles at 30+/-1 degrees C and was inoculated with anaerobic biomass from a UASB. Two feeding strategies were assessed: (a) batch and (b) batch followed by fed-batch. In strategy (a) the reactor was fed in 10 min with 2L wastewater containing sulfate and carbon sources. In strategy (b) 1.2 L wastewater (containing only the sulfate source) was fed during the first 10 min of the cycle and the remaining 0.8L (containing only the carbon source) in 240 min. The COD/sulfate ratios assessed were 1 and 3. Based on these values and on the concentrations of organic matter (0.5-11.25 gCOD/L) and sulfate (0.5 and 2.5 gSO(4)(2-)/L), the sulfate and organic matter loading rates applied equaled 1.5 and 4.5 gSO(4)(2-)/Ld for sulfate and 1.5, 4.5 and 13.5 gCOD/Ld for organic matter. After stabilization of the syst...Continue Reading

References

Oct 4, 2005·Environmental Technology·S H ChuangR Y Horng
May 23, 2006·Journal of Biotechnology·Alain DollaZorah Dermoun
Mar 12, 2009·Applied Biochemistry and Biotechnology·Gregor F FriedlEugênio Foresti

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Citations

Aug 29, 2013·Journal of Environmental Management·He BaiYing Feng
Mar 5, 2011·Journal of Environmental Management·Augusto L O CostabileEugenio Foresti
Jun 13, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Silvio MontalvoIleana Pereda

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